本发明公开了一种从刚玉电弧炉冶炼烟尘中提取金属镓的方法,它在刚玉烟尘中加入配料CaCO_3和K_2CO_3,然后经制料、焙烧、磨细、碱浸、分离、碱浸、电解、精炼提纯而制得金属镓,CaCO_3的加入量按与刚玉烟尘的重量比为:刚玉烟尘:CaCO_3=1.00:(1.30～1.45);K_2CO_3的加入量按与刚玉烟尘的重量比为:刚玉烟尘:K_2CO_3=1.00:(0.14～0.19)。本发明 The invention discloses a method for extracting metal gallium from smelting smelter of corundum electric arc furnace, which adds ingredients CaCO3 and K2CO3 in corundum soot, and then is prepared through the processes of material preparation, calcination, grinding, alkali leaching, separation, alkali leaching, electrolysis, Refined and purified to obtain metal gallium, CaCO_3 by the amount of corundum and dust weight ratio of corundum: CaCO3 = 1.00: (1.30 ~ 1.45); K_2CO_3 by the amount of corundum and dust weight ratio of corundum: K 2 CO 3 = 1.00: (0.14 ~ 0.19). this invention